Pipe-vise



M. DEAN.

PIPE VISE.

' APPLICATION FILED was. 1918.

Patented Oct. 7, 1919.

THE COLUMBIA PMNGIJRAFH c0. WASHINGTON, D. c.

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MARK DEAN, OF BOONVILLE, NEW YORK,

PIPE-VISE.

Specification of Letters Patent.

Patented Oct. 7, 1919.

Application filed August 9, 1918. Serial No. 249,172.

following is a specification.

The object of my invention is to provide a vise of simple, strong and peculiar construction by which pipes of different sizes may be received and firmly held and readily released without injury to the pipe or other article so received and held.

My improved pipe-vise is not only capalble of indefinite adjustability to different sizes of pipes, but the limit of closing of the gripping jaws is automaticallydetermined and secured by the pipe itself without any biting or other injurious contact with the material of said pipe.

One form of my invention is shown in the accompanying drawings, in which Figure 1 is a side elevation.

Fig. 2 is a top plan.

Fig. 3 is a longltudinal section to display the eccentrics and the limiting bar.

Same letters indicate similar parts in the difi'erent drawings.

A is a suitable base upon which the pipevise is mounted. The pipe-vise consists primarily of two revoluble cylinders, B, C, mounted respectively on pins 6, b, in the up-right a, and the yoke a, rising from the base A.

This yoke is mounted on a link E which swings on the bolt a, passing through the base A. The sizes and shapes of these cylinders, B, C, vary with the number of different sizes of pipes or other articles, which are to be treated by the aid of this pipe-vise. Obviously, the greater variety of sizes the larger will be the periphery of the cylinders. These cylinders are provided around their periphery with a number of receiving and gripping depressions, D, D, which vary to correspond with the various articles to be received and held by said vise from the smallest which, as shown, is '3; inch, to the largest which, as shown, is 1% inch pipe.

It will be understood that the depressions D will be so arranged on the cylinder B as to register with the depressions D on the disk O, when the cylinders are turned into position to receive the pipe. The cylinders are fr e to revol e in p nde y Th rear end of the pin 6 is preferably square to enable it to "be turned by a handle placed thereon, and by which handle the'cam F, rigid on the pin 6, is also thrown forward or backward to bring the disk O toward or away from the-cylinder B, to secure the grip or release of the pipe held between the registering depressions.

' A foward and back movement of the cylinder O independently of the swinging of the cam, on which it is mounted, is secured by turning the bolt K, out or in so that when this bolt is turned the yoke moves toward or from the cylinder B, according to the position of the bolt, carrying the cylinder O with it.

The features so far described are'all that will be necessary to enable my improved pipe-vise to receive and hold pipes of the desired size. In such case, the operation will consist of turnin the two cylinders so that the proper sized depressions will register their lower edges while their upper edges are far enough apart to receive the pipe from above; the pipe will be placed into the mouth thus formed by the openings and allowed to drop on to-the limiting bar G, and then the cylinder C will be thrown into gripping contact to hold the pipe. After the work desired has been done on the pipe, the jaws will be opened by a reverse motion of the cam F, which will release the pipe. In this use of my improved adjustable pipe-vise, however, the gripping depressions would not secure a perfect hold upon the pipe unless the pipe was exactly centered before it was gripped. If the pipe in falling lie a little above or below the center, the pressure would cause the pipe to shootnp or down respectively. To avoid this I lntroduce an automatically adjustable limiting bar G.

This bar is loosely hung on the two eccentrics, H, H, which are pinned as at h, h, to the surface of the cylinders B, C, re.- spectively. These eccentrics are so shaped that the limiting bar rises and falls to levels which correspond to the sizes of the differ ent depressions D, D. When properly adjusted the limiting bar always occuples a position sufiiciently below the opening between the lower edges of the registering depressions that the pipe to be held on contacting with said bar assumes a position slightly below the center of the registering depresions and therefore all tendency to sho t upward as the gripping takes place is counteracted and a perfect hold is secured on the pipe.

To guard against breakage which might result to this bar, if the cylinders B, C, should not turn in unison, I have made the opening J in which the eccentric I-I turns elongated to permit a sliding movement of the bar without interfering with its level.

The many uses and advantages of my improved pipe-vise will, I think, be understood without further explanation.

I claim:

1. A pipe-vise which comprises a pair of revolu-ble cylinders having peripheral gripping depressions of various sizes, a yoke whereby one of said revoluble cylinders may be moved toward and from the other cylinder, and means for causing a depression of one of said cylinders to register with the corresponding depression of the other cylinder to grasp and hold the pipe to be treated.

2. A pipe-vise which comprises a pair of revoluble cylinders having gripping depressions of various sizes and means for causing a depression of one of said cylinders to register with the corresponding depression of the other cylinder to grasp and hold the pipe to be treated; and an automatically adjustable limiting device which assumes the desired level below the opening between said depressions and causes said pipe to position itself to receive the gripping pressure therefrom.

3. A pipe-vise which comprises a pair of independently revoluble cylinders with suitable peripheral gripping depressions; a yoke and swinging cam whereby one of said cylinders may be caused to approach and recede from the other, and means whereby an additional forward and back movement of said cylinder independent of the swinging of the cam may be secured.

MARK DEAN.

Witnesses:

CLARENCE R. SPERRY, W. P. PREBLE,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

